In the “Rotate View” group of the [View] menu, you can rotate the display of the currently open PDF.
Clockwise
Rotates the display of the PDF 90 degrees to the right.
Counterclockwise
Rotates the display of the PDF 90 degrees to the left.
The rotation from the [View] menu rotates the display state of the current page. If you want to save the rotation for the PDF, you need to rotate from the [Edit] menu in a product edition that allows PDF editing.
If you edit annotations, signatures, stamps, etc. on a PDF that has been rotated from the [View] menu, the result may be different from the intended position or direction. If you want to edit a rotated PDF, please rotate from the [Edit] menu in a product edition that allows PDF editing.